package com.atguigu.lease.web.admin.custom.interceptor;

import com.atguigu.lease.common.context.LoginUser;
import com.atguigu.lease.common.context.LoginUserContext;
import com.atguigu.lease.common.exception.LeaseException;
import com.atguigu.lease.common.result.ResultCodeEnum;
import com.atguigu.lease.common.utils.JwtUtil;
import io.jsonwebtoken.Claims;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;

/*
 * 验证token的拦截器
 */
@Component
public class AuthenticationInterceptor implements HandlerInterceptor {
    /*
    * preHandle作用：拦截发送到控制台的请求，并做验证
     */

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        //获取请求头中的token
        String token = request.getHeader("access_token");
        //验证token是否合法

        if (token == null || token.isEmpty()) {
            throw new LeaseException(ResultCodeEnum.ADMIN_LOGIN_AUTH);
        }else {
            //解析token
            Claims claims = JwtUtil.parseToken(token);

            Long userId = claims.get("userId", Long.class);
            String userName = claims.get("userName", String.class);


           /* request.setAttribute("userId", userId);
            request.setAttribute("userName", userName);*/

            //把token中的信息保存到threadlocal中
            LoginUserContext.set(new LoginUser(userId, userName));
        }
        return true;

    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        //移除请求域中的数据
        /*request.removeAttribute("userId");
        request.removeAttribute("userName");*/

        //移除threadlocal中的数据
        LoginUserContext.remove();
    }
}
